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April 22, 2021

The tropical Pacific Ocean is warming up! What does that mean for the way we measure the El Niño-Southern Oscillation (ENSO)?  Time to start looking at relative sea surface temperatures.

small US maps showing different temperature and precipitation normals compared to the 20th-century average
April 19, 2021
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Every ten years, NOAA releases an analysis of U.S. weather of the past three decades, calculating average values for temperature, rainfall, and other climate conditions that have come to represent the new “normals” of our changing climate.

GLobal map of March 2021 temperature compared to average
April 14, 2021
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Although this was the smallest warm departure for any March since 2014, it was still the eighth-warmest March for the planet in the 142-year record.

Hurricane Katrina

As NOAA adopts 1991–2020 as the new 30-year period of record, “average” hurricane activity in the Atlantic Ocean will increase. Average activity for the new period of record means 14 named storms, 7 hurricanes, and 3 major hurricanes.

Mauna Loa Observatory CC license by Christopher Michel

Levels of the two most important anthropogenic greenhouse gases, carbon dioxide and methane, con